I tried to reproduce this bug in kvm, hoping to get copy/pastable dumps. The test didn't run at all, instead I got a stunning number of the following slowpath warning (seem like it was repeated over 100 times during 9ms). I see them occasionally (less than once every few minutes) on real hardware as well. I don't know what to make of them and if they can help in any way. Here is the repeated message: [ 63.141432] WARNING: CPU: 0 PID: 54 at kernel/res_counter.c:28 res_counter_uncharge_until+0x98/0xa0() [ 63.141434] Modules linked in: veth(E) xt_CHECKSUM(E) iptable_mangle(E) ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E) nf_co nntrack_ipv4(E) nf_defrag_ipv4(E) nf_nat_ipv4(E) nf_nat(E) nf_conntrack(E) xt_tcpudp(E) bridge(E) stp(E) llc(E) iptable_filter(E) ip_tables (E) ppdev(E) x_tables(E) kvm(E) microcode(E) cirrus(E) ttm(E) serio_raw(E) drm_kms_helper(E) virtio_balloon(E) drm(E) syscopyarea(E) sysfil lrect(E) sysimgblt(E) i2c_piix4(E) parport_pc(E) mac_hid(E) lp(E) parport(E) psmouse(E) pata_acpi(E) floppy(E) [ 63.141456] CPU: 0 PID: 54 Comm: kworker/0:1 Tainted: G W E 3.18.24-realtime-1-with-patch-rt22+ #2 [ 63.141457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 63.141459] Workqueue: cgroup_destroy css_killed_work_fn [ 63.141462] 0000000000000009 ffff88013639bb98 ffffffff8174ad9a 0000000000000002 [ 63.141465] 0000000000000000 ffff88013639bbd8 ffffffff8104f371 ffff8800ba093100 [ 63.141467] ffff8800ba093100 0000000000000000 0000000000001000 ffff8800ba093100 [ 63.141468] Call Trace: [ 63.141470] [<ffffffff8174ad9a>] dump_stack+0x4e/0x84 [ 63.141471] [<ffffffff8104f371>] warn_slowpath_common+0x81/0xc0 [ 63.141473] [<ffffffff8104f46a>] warn_slowpath_null+0x1a/0x20 [ 63.141475] [<ffffffff810f76a8>] res_counter_uncharge_until+0x98/0xa0 [ 63.141476] [<ffffffff811aa88e>] mem_cgroup_reparent_charges+0x2ee/0x3f0 [ 63.141478] [<ffffffff811aab0b>] mem_cgroup_css_offline+0x14b/0x3e0 [ 63.141480] [<ffffffff810ebf6e>] css_killed_work_fn+0x4e/0x170 [ 63.141481] [<ffffffff8106b89c>] process_one_work+0x20c/0x5b0 [ 63.141483] [<ffffffff8106b801>] ? process_one_work+0x171/0x5b0 [ 63.141485] [<ffffffff8106bdab>] worker_thread+0x16b/0x4c0 [ 63.141486] [<ffffffff8106bc40>] ? process_one_work+0x5b0/0x5b0 [ 63.141488] [<ffffffff81070fc9>] kthread+0xd9/0xf0 [ 63.141490] [<ffffffff8109e51d>] ? trace_hardirqs_on+0xd/0x10 [ 63.141492] [<ffffffff81070ef0>] ? kthread_create_on_node+0x240/0x240 [ 63.141493] [<ffffffff817528c8>] ret_from_fork+0x58/0x90 [ 63.141495] [<ffffffff81070ef0>] ? kthread_create_on_node+0x240/0x240 [ 63.141496] ---[ end trace 0000000000000075 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
